An attempt to close #6.

Demo

This adds a playground directory that consists of a substrait-playground crate that provides wasm bindings for the validator. It uses the pbjson branch of the substrait-rs bindings to deserialize the provided JSON input. A very basic svelte app renders an input field and the validator output for that. CI can deploy this to GitHub pages.

I did have to make some modifications in the validator because a url method was not implemented for the wasm target.

I'm just putting this out here for visibility. This still requires some front-end work to be usable. And there are many opportunities to improve:

• reduce the wasm blob size (currently 4MB)
• add selector for example JSON inputs
• add SQL input
• add binary input
• match substrait website style
• (maybe) use validator protobuf and render in the browser based on that (instead of using the validator html output)

To build this locally you need nodejs:

cd playground
npm ci
npm run dev